Key stretch: Weeks 7-9. Coming out of their bye, the 49ers face three consecutive AFC South contenders, including two on the road: at Houston, at Indianapolis and home against Tennessee.

The difference makers: Running back Frank Gore, who is in pursuit of his fourth consecutive 1,000-yard rushing season “… Linebacker Patrick Willis, the first 49er to make a Pro Bowl in each of his first two seasons since Ronnie Lott “… LT Joe Staley anchors an otherwise unheralded offensive line “… Cornerback Nate Clements struggled in the preseason but will always be assigned to the opponent’s top receiver.

Keep an eye on: Receiver Josh Morgan, who could have a breakout season as the starter opposite Isaac Bruce. “… G Chilo Rachal, who came on strong at the end of last season and looks ready to make an impact”… Outside linebacker Parys Haralson, who had 8.0 sacks in limited time last season. “… Cornerback Shantae Spencer, the surprise winner in the competition to replace veteran Walt Harris.

In the spotlight: Outside linebacker Manny Lawson, who is being counted on to boost a sagging pass rush but whose history suggests he might be miscast.

Fresh face to watch: Free safety Dashon Goldson, who, in his third season replaces Mark Roman as the starter. The 49ers like his ranginess and playmaking ability.

The hype: Owner Jed York vowed that last season would be the last time the 49ers fail to make the playoffs, setting off wild cheers in the locker room.

The reality: The 49ers did little in the offseason to alter a roster that went 7-9; the contract impasse with first-round pick Michael Crabtree doesn’t help.

Lingering questions: Is quarterback Shaun Hill good enough keep a modest offense afloat? “… Is there a pass rush in the house? “… Is the offensive line good enough to pave the way for a run-oriented offense? “… Will Crabtree ever show up?

Good sign: If Gore and understudy Glen Coffee are both racking up healthy rushing totals, the 49ers’ plan is working beautifully.

Bad sign: Any sign of high-scoring games means the 49ers are in trouble. This team is designed to grind away and play tough defense, not match play for play in a shootout.

Bottom line: Much hinges on Singletary’s ability to coax more out of familiar faces — more yards, more sacks, more defensive turnovers. The talent is there to contend in a weak NFC West, but it’s borderline.

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